NAME
asin, asinf, asinl - arc sine function
SYNOPSIS
#include <math.h>
I double asin(double x );
I float asinf(float x );
I long double asinl(long double x );
Link with
-lm.
DESCRIPTION
The
R asin ()
function calculates the arc sine of x; that is
the value whose sine is x.
If x falls outside the range
-1 to 1,
R asin ()
fails and errno is set.
RETURN VALUE
The
R asin ()
function returns the arc sine in radians and the
value is mathematically defined to be between -PI/2 and PI/2
(inclusive).
ERRORS
CONFORMING TO
SVr4, POSIX.1-2001, 4.3BSD, C89, C99.
The
float
and
long double
variants are C99 requirements.
SEE ALSO
ČLÁNKY DO MAILU